Hydraulic or pneumatic actuator unit for valves



FIG. 1 is a top plan view of our design for a hydraulic or pneumatic actuator unit for valves;

FIG. 2 is a front elevation view;

FIG. 3 is a bottom plan view;

FIG. 4 is a rear elevation view;

FIG. 5 is a side elevation view, seen from the right;

FIG. 6 is a side elevation view, seen from the left. 

The ornamental design for a hydraulic or pneumatic actuator unit for valves, as shown. 